| 摘要 |
<p>An electrohydraulic proportional valve wherein an electromagnetic force motor (12) sends a mechanical signal to a pilot actuator which moves a main spool (56). The pilot actuator includes a pilot spool (24) slidably received in a pilot sleeve (20). A feedback spool (71) which is movable with the main spool has a camming surface against which the pilot sleeve (20) rides. A load check valve is provided that isolates the load pressure from system pressure when desired.</p> |
